First youtube started not loading videos, then almost all google products had problem. I had 12.04 and 12.10 on Asus N56VM. There was that problem. Now I have 13.04 on same machine. It still is. I have chrome, chromium and firefox. There is no difference. İnternet is generally fine. The problem is only on google products.

Edit:

Changing DNS not worked. I tried lots of DNS servers.

I tried with 3 different ISPs.

It is not a Flash Player issue I think, because the problem is on all of Google services (Gmail, Calendar, Maps), not only YouTube.

Tried disabling hardware acceleration option on Flash Player.

The problem is temporary. Some times Google.com, Gmail or Youtube work, some times not. Thus so difficult to track the problem.

These are some links related to my question. It is the same problem and no answer.

Edit 2: Question marked as duplicate. Okay, question is same (I noticed that when it marked, sorry). But the answer to that question is "change DNS" and I said it does not work for me.

Edit 3: I noticed that If I sing out from google account Youtube works well on all of my browsers(Chrome, Chromium, Firefox). I tried with different google accounts of mine on different browsers. Result is same. Finally I catch something to track this problem. If I'm signed in to google there is problem with google products.

this has nothing to do with DNS as this 3 statements above. Webpage is correctly displayed...
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DeeJul 3 '13 at 17:09

3

The only thing I can think of now is that your ISP is blocking streaming video. I see the exact same a lot on hotspots, 3G/mobile internet, etc. as being a policy of the internet service. Do you have another network/ISP you can connect the computer to and check again?
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gertvdijkJul 3 '13 at 17:31

Sorry it didn't solve your issue. I thought we had the same problem. Blocking the cookies from youtube solved it for me. Maybe you can check your /etc/hosts file contains any entries related to google.com, youtube etc. If there are try to delete those and reboot the computer.
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JohankorJul 12 '13 at 16:55

I checked hosts file. There is nothing about google our youtube. Thanks for your trying. This problem is really annoying. I'm afraid it will cause me to pass windows.
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CanJul 12 '13 at 20:39

Hey you were right. It is cookie issue. Did you find a solution to use Youtube with signed in ?
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CanJul 15 '13 at 2:23

I am glad it worked. I don't use youtube as signed in, so no solutions about it yet.
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JohankorJul 15 '13 at 5:54

What I see on your screenshot, the youtube pages work OK, but video does not. This is because you missing support for any flash/flv player. This (How do I install Adobe Flash player?) will serve you very well.

The flash/flv player is OK. Otherwise, you get on Youtube a warning in this sense. If the flash player would not be present, you would not see any menu for the video.
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Radu RădeanuJul 3 '13 at 17:27

It might be a flash player issue because when I visited this page adobe.com/shockwave/welcome I see a warning 'No plug-in available to display this content.' However on this page adobe.com/software/flash/about I see 'You have version 11,8,800,96 installed' and playing flash above. google.com still have same problem. But not everytime I try. Sometimes it loads immediately. Sometimes doesn't load for five minutes :S
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CanJul 3 '13 at 17:33

I had similar behaviour on fresh xbuntu install, basic flash banners was animated, but no video from youtube.., so some can say they know everything... but they dont. I do not remember exactly how did I solved, but I did play with different flash packages and now it is just working.
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DeeJul 3 '13 at 18:20

It is not only Youtube. Almost all of Google products are same. Even Gmail. Thus I think its not flash player issue.
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CanJul 3 '13 at 19:38